/*
 *  Copyright (c) 2004, The University Scheduler Project
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  - Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  - Neither the name of the University Scheduler Project nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 *  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 *  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 *  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 *  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY OF SUCH DAMAGE.
 *
 */

package edu.rpi.scheduler.schedb.load;

import edu.rpi.scheduler.schedb.TextNotes;
import edu.rpi.scheduler.schedb.load.spec.DataElement;
import edu.rpi.scheduler.schedb.load.spec.NotesLoader;
import edu.rpi.scheduler.schedb.spec.Notes;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import java.util.ArrayList;
import java.util.List;

public class XmlNotesLoader implements NotesLoader {
    public Notes readNotes(DataElement element)
            throws DbLoadException {
        Element parent = ((XmlDataElement) element).getDomElement();
        List<String> notes = new ArrayList<String>();
        NodeList notels = parent.getElementsByTagName("note");
        for (int i = 0; i < notels.getLength(); i++) {
            Element notel = (Element) notels.item(i);

            String note = readNote(notel);
            if (note != null) notes.add(note);
        }

        TextNotes notesobj = new TextNotes(notes);
        return notesobj;
    }

    protected String readNote(Element notel) throws DbLoadException {
        NodeList children = notel.getChildNodes();
        StringBuffer buf = new StringBuffer();
        for (int i = 0; i < children.getLength(); i++) {
            Node node = children.item(i);

            if (node.getNodeType() == Node.TEXT_NODE) {
                buf.append(node.getNodeValue());
            }

        }
        return buf.length() == 0 ? null : buf.toString();
    }
}
